Despite winning seven of the nine games they have started together, the two have not always been selected in the same team by either Andres Villas-Boas or former Spurs boss Harry Redknapp.

However, Friedel believes they are among the best in the business when they share the pitch at the same time.

"When we have played with two up front, Jermain has really thrived on it, as he can save his energy for when he is inside the box. That is when it really matters for us.

"Last season the system we played was slightly different, with Rafael van der Vaart just behind a lone forward, while at the beginning of this year injuries meant we didn't have the chance to play with two up front, especially at home.

"Jermain always plays on the shoulder of the defender so if a team want to push high up the pitch, he will always keep them honest.

"The goal he scored against Panathinaikos was just on-side but he is always right on the edge so defenders have to keep an eye on him."

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Dangerman: Spurs must keep control of Fellaini

Meanwhile, Spurs could move into third place in the league if they beat Everton at Goodison Park on Sunday.

Belgium compatriot Jan Vertonghen knows how difficult it will be to restrict Everton top scorer Marouane Fellaini.

"Fellaini is one of the big players in the Premier League," Vertonghen said.

"He does amazing. He's a very difficult player to play against. He is strong in the air and with his feet.

"He is their most important player and it will be difficult to play him.

"But the way we have played the last three games in the Premier League, we can beat anyone and that is what we will be going for."